CN208686400U - The support unit of branch structure at the beginning of a kind of subsurface excavation method for PBA - Google Patents
The support unit of branch structure at the beginning of a kind of subsurface excavation method for PBA Download PDFInfo
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- CN208686400U CN208686400U CN201821207338.4U CN201821207338U CN208686400U CN 208686400 U CN208686400 U CN 208686400U CN 201821207338 U CN201821207338 U CN 201821207338U CN 208686400 U CN208686400 U CN 208686400U
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- main reinforcement
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- branch structure
- support unit
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Abstract
The support unit of branch structure at the beginning of the utility model provides a kind of subsurface excavation method for PBA, the button including one as more reinforcing bars adjustable in length made of affixed encircles grid steel frame, and the both ends of button arch grid steel frame are equipped with connecting elements；Support unit described in the utility model for the first branch structure of PBA subsurface excavation method, its main reinforcement length is adjustable, when will detain arch grid steel frame connect with side hole grid steel frame when, can according to actual needs adjusting buckle arch grid steel frame length, it can successfully be connect with side hole grid steel frame, it is greatly improved construction efficiency, ensure that the quality of connection of steelframe.
Description
Technical field
The utility model belongs to technical field of building construction, more particularly, to branch structure at the beginning of a kind of subsurface excavation method for PBA
Support unit.
Background technique
Tunneling PBA engineering method is the common construction method of Underground Subway Station against construction is built, and common cut and cover method subway station is
It carries out from bottom to top, and tunneling PBA engineering method is to carry out the double-deck lining cutting from top to bottom against construction is built, and is tied comprising first branch structure and two linings
Structure lining cutting twice, wherein just branch structure utilizes different model reinforcing bar, junction steel plate, connecting angle iron composition steel grating arch and injection
Concrete forms reinforced concrete structure, timely and effectively forms tunnel or tunneling preliminary bracing system, thus is widely used
At the beginning of Underground Subway Station in branch structure, steel grating arch is the skeleton of the first branch structure of tunneling, and the installation of steel grating arch is not
Can or the first important link in branch structure of scarce important procedure and tunneling, how the small pilot tunnel of branch structure at the beginning of existing tunneling it
Between to form timely and effective supporting construction be key points and difficulties of the tunneling just in branch structure construction.
In the construction of Underground Subway Station application PBA engineering method when hole, need to detain arch grid steel frame and side hole grid steel frame
Connection cyclization, but formerly due to the construction of side hole, the construction of middle hole is rear, and the construction of the side hole Dong Hezhong is asynchronous, along with prefabricated button
Arch grid steel frame length is not adjustable, and when its is too long or too short, is encircleed grid steel frame with side hole grid steel frame and is connect difficulty, often
Often cannot accurate centering, need that bending is connected with button arch grid by force by embedded bar, but embedded bar diameter is generally large, past
Past not pliable, difficulty of construction is big, and the quality of connection of steelframe is not easy to guarantee after constructing by force, and security risk is more.
Utility model content
In view of this, the utility model be directed to a kind of subsurface excavation method for PBA at the beginning of branch structure support unit, this is practical
It is novel be in order to which the construction for solving the hole side Dong Hezhong in the prior art is asynchronous, the grid steel frame of construction in later period because construction deviation without
The problem of method is correctly connect with the side hole grid steel frame constructed in advance or quality of connection not can guarantee.
In order to achieve the above objectives, the technical solution of the utility model is achieved in that
The support unit of branch structure at the beginning of a kind of subsurface excavation method for PBA, including one as more reinforcing bars it is affixed made of length
Adjustable button encircles grid steel frame, and the both ends of button arch grid steel frame are equipped with connecting elements.
Further, the button arch grid steel frame includes the main reinforcement of four arches, and four main reinforcements pass through multiple U-shaped muscle and more
A word muscle links together, and the length of four main reinforcements is adjustable；Four main reinforcements are parallel to each other, are arranged in two rows two and arrange,
Along the length direction of main reinforcement, multiple U-shaped muscle are successively welded with, U-shaped muscle lock ring is four main reinforcement outer surfaces；In upper and lower two masters
Supporting welding has multiple word muscle between muscle, and the top and bottom of the word muscle are respectively welded in two main reinforcements up and down.
Further, every main reinforcement includes a middle part main reinforcement, two side main reinforcements and two connection sleeves；
Middle part main reinforcement and side main reinforcement are arch steel, and the reinforcing bar outer surface positioned at middle part main reinforcement both ends is equipped with screw thread,
The reinforcing bar outer surface of side main reinforcement one end is equipped with screw thread, and connects sleeve lining and be equipped with screw thread；The both ends point of every middle part main reinforcement
Not Tong Guo a connection sleeve be connected with the end of thread of side main reinforcement, the end of thread of the middle part main reinforcement and side main reinforcement spiral shell
Line end is respectively positioned in connection sleeve, and by rotation connection sleeve, the length of main reinforcement is adjusted.
Further, every one end of button arch grid steel frame is welded with two symmetrical connecting elements, and connecting elements is
One L-type steel plate being made of two blocks of mutually perpendicular plates, one of plate of the L-type steel plate are welded on two sides
In main reinforcement, the plate face of another block of plate of L-type steel plate is perpendicular to side main reinforcement and concordant with the endpoint of two side main reinforcements.
Further, in connecting elements, multiple bolts hole are equipped in the plate vertical with two side main reinforcements.
Further, it in connecting elements, is set in the plate vertical with two side main reinforcements there are two bolt hole.
Compared with the existing technology, the utility model has the advantage that
Support unit described in the utility model for the first branch structure of PBA subsurface excavation method, main reinforcement length is adjustable, when
Will button arch grid steel frame when being connect with side hole grid steel frame, the length of grid steel frame can be encircleed by adjusting buckle according to actual needs, make it
It can successfully be connect with side hole grid steel frame, the construction that can well solve the hole side Dong Hezhong in the prior art is asynchronous,
The grid steel frame of construction in later period because construction deviation can not correctly be connect with the side hole grid steel frame constructed in advance or quality of connection without
The problem of method guarantees, constructing operation is convenient, is greatly improved construction efficiency, ensure that the quality of connection of steelframe.
Detailed description of the invention
The attached drawing for constituting a part of the utility model is used to provide a further understanding of the present invention, this is practical new
The illustrative embodiments and their description of type are not constituteed improper limits to the present invention for explaining the utility model.?
In attached drawing:
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is cross-sectional view of the button arch grid steel frame at the section A in Fig. 1；
Fig. 3 is the enlarged diagram of part B in Fig. 1；
Fig. 4 is connection relationship diagram of the connecting elements in button arch grid steel frame；
Fig. 5 is the connection relationship diagram of button arch grid steel frame and side hole grid steel frame.
Description of symbols:
1- button arch grid steel frame；Main reinforcement in the middle part of 11-；The side 12- main reinforcement；13- connection sleeve；14-U shape muscle；The word of 15-
Muscle；2- connecting elements；The side 3- hole grid steel frame.
Specific embodiment
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For limitations of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can explicitly or implicitly include one or more of the features.It is in the description of the present invention, unless another
It is described, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State the concrete meaning of term in the present invention.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figs. 1-5, the support unit of branch structure at the beginning of a kind of subsurface excavation method for PBA, including one consolidated by four main reinforcements
The button of adjustable in length made of connecing encircles grid steel frame 1, and the both ends of button arch grid steel frame 1 are equipped with connecting elements 2.
Specifically, the button arch grid steel frame 1 includes the main reinforcement of four arches, and four main reinforcements pass through multiple 14 Hes of U-shaped muscle
Multiple word muscle 15 link together, and the length of four main reinforcements is adjustable；Four main reinforcements are parallel to each other, are arranged in two rows two
Column, along the length direction of main reinforcement, are successively welded with multiple U-shaped muscle 14,14 lock ring of U-shaped muscle is four main reinforcement outer surfaces；Upper
Supporting welding has multiple word muscle 15 between lower two main reinforcements, and the top and bottom of the word muscle 15 are respectively welded at upper and lower two
In root main reinforcement.
Wherein, every main reinforcement is formed by connecting by a middle part main reinforcement 11 and two side main reinforcements 12, middle part main reinforcement 11 and side
Side main reinforcement 12 is arch steel, and the both ends of every middle part main reinforcement 11 are separately connected a side main reinforcement 12, specifically, middle part master
The both ends of muscle 11 are separately connected a connection sleeve 13, are connect side main reinforcement 12 with middle part main reinforcement 11 by the connection sleeve 13
Together；Reinforcing bar outer surface positioned at 11 both ends of middle part main reinforcement is equipped with screw thread, and the reinforcing bar outer surface of 12 one end of side main reinforcement is equipped with
Screw thread, and connect 13 inner wall of sleeve and be equipped with screw thread；An end of thread and 12 end of thread of side main reinforcement for the middle part main reinforcement 11 is equal
In connection sleeve 13, and through rotation connection sleeve 13, the length of main reinforcement is adjusted.
Every one end of button arch grid steel frame 1 is welded with two symmetrical connecting elements 2, for that will detain arch grid steel frame
1 connect with side hole grid steel frame 3, and connecting elements 2 is a L-type steel plate being made of two blocks of mutually perpendicular plates, the L-type
One of plate of steel plate is welded in two side main reinforcements 12, and the plate face of another block of plate of L-type steel plate is perpendicular to side
Main reinforcement 12 and concordant with the endpoint of two side main reinforcements 12, also, in connecting elements 2, vertical with two side main reinforcements 12
It is set in plate there are two bolt hole, is connect for arch grid steel frame 1 will to be detained with side hole grid steel frame 3.
When site operation, before it will detain arch grid steel frame 1 and be connect with side hole grid steel frame 3, it can adjust according to actual needs
The length of button arch grid steel frame 1, method particularly includes: sleeve 13, adjustable middle part main reinforcement 11 or side are connected by rotation
Length of the main reinforcement 12 in connection sleeve 13 adjusts the length of main reinforcement, mesh that is close and reaching adjusting buckle arch 1 length of grid steel frame
's.
After button arch 1 length adjustment of grid steel frame is good, button arch grid steel frame 1 is connect with side hole grid steel frame 3；Specifically
Ground is embedded with the steel plate of one piece of connection on side hole grid steel frame 3, and bolt hole is equipped in the steel plate, by connecting elements 2
In bolt hole be aligned with the bolt hole in the pre-embedded steel slab, two boards part is linked together with bolt.
The foregoing is merely the preferred embodiments that the utility model is created, and are not intended to limit the utility model wound
It makes, within all spirit and principle created in the utility model, any modification, equivalent replacement, improvement and so on should all include
Within the protection scope that the utility model is created.
Claims (6)
1. the support unit of branch structure at the beginning of a kind of subsurface excavation method for PBA, it is characterised in that: it is affixed by more reinforcing bars including one and
At adjustable in length button encircle grid steel frame (1), and the button arch grid steel frame (1) both ends be equipped with connecting elements (2).
2. the support unit according to claim 1 for the first branch structure of PBA subsurface excavation method, it is characterised in that: the button arch
Grid steel frame (1) includes the main reinforcement of four arches, and four main reinforcements are connected to by multiple U-shaped muscle (14) and multiple word muscle (15)
Together, and the length of four main reinforcements is adjustable；
Four main reinforcements are parallel to each other, are arranged in two rows two and arrange, along the length direction of main reinforcement, are successively welded with multiple U-shaped muscle
(14), U-shaped muscle (14) lock ring is four main reinforcement outer surfaces；
Supporting welding has multiple word muscle (15), the top and bottom difference of the word muscle (15) between upper and lower two main reinforcements
It is welded in two main reinforcements up and down.
3. the support unit according to claim 2 for the first branch structure of PBA subsurface excavation method, it is characterised in that: every main reinforcement
Including a middle part main reinforcement (11), two side main reinforcements (12) and two connection sleeves (13)；
Middle part main reinforcement (11) and side main reinforcement (12) are arch steel, and the reinforcing bar outer surface for being located at middle part main reinforcement (11) both ends is set
There is screw thread, the reinforcing bar outer surface of side main reinforcement (12) one end is equipped with screw thread, and connects sleeve (13) inner wall and be equipped with screw thread；In every
The both ends of portion's main reinforcement (11) pass through connection sleeve (13) respectively and are connected with the end of thread of side main reinforcement (12), the middle part master
One end of thread of muscle (11) is respectively positioned on side main reinforcement (12) end of thread to be connect in sleeve (13), and passes through rotation connection sleeve
(13), the length of main reinforcement is adjusted.
4. the support unit according to claim 3 for the first branch structure of PBA subsurface excavation method, it is characterised in that: button arch grid
Every one end of steelframe (1) is welded with two symmetrical connecting elements (2), and connecting elements (2) is one and is hung down mutually by two pieces
The L-type steel plate of straight plate composition, one of plate of the L-type steel plate are welded on two side main reinforcements (12), L-type steel
The plate face of another block of plate of plate is perpendicular to side main reinforcement (12) and concordant with the endpoint of two side main reinforcements (12).
5. the support unit according to claim 4 for the first branch structure of PBA subsurface excavation method, it is characterised in that: connecting elements
(2) in, multiple bolts hole are equipped in the plate vertical with two side main reinforcement (12).
6. the support unit according to claim 5 for the first branch structure of PBA subsurface excavation method, it is characterised in that: connecting elements
(2) it in, is set in the plate vertical with two side main reinforcement (12) there are two bolt hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821207338.4U CN208686400U (en) | 2018-07-27 | 2018-07-27 | The support unit of branch structure at the beginning of a kind of subsurface excavation method for PBA |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821207338.4U CN208686400U (en) | 2018-07-27 | 2018-07-27 | The support unit of branch structure at the beginning of a kind of subsurface excavation method for PBA |
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| Publication Number | Publication Date |
|---|---|
| CN208686400U true CN208686400U (en) | 2019-04-02 |
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ID=65882687
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821207338.4U Active CN208686400U (en) | 2018-07-27 | 2018-07-27 | The support unit of branch structure at the beginning of a kind of subsurface excavation method for PBA |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483133A (en) * | 2020-11-26 | 2021-03-12 | 北京市政路桥股份有限公司 | Steel bar grating connecting structure for primary support structure of arch-connected underground excavated pipe gallery and construction method |
-
2018
- 2018-07-27 CN CN201821207338.4U patent/CN208686400U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483133A (en) * | 2020-11-26 | 2021-03-12 | 北京市政路桥股份有限公司 | Steel bar grating connecting structure for primary support structure of arch-connected underground excavated pipe gallery and construction method |
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